core

#### Touch Speed %

The Touch Speed box lets you change the speed at which the CMM takes hits. Depending on the state of the Display absolute speeds check box in the Part/Machine tab of the Setup Options dialog box, this is either be an absolute speed (mm/sec) or a percentage of the machine's defined top speed. This cannot exceed twenty percent.

The Edit window command line for this option reads:
TOUCHSPEED/nnn.nnnn

Where nnn.nnnn is a number value for the speed.

To understand the effects of changing either PREHIT or RETRACT distances and MOVE or TOUCH SPEED, it's important to understand how the options interact during DCC feature measurement. The order of events is that the machine moves toward the feature at MOVE SPEED. When it reaches PREHIT distance, it approaches the feature at TOUCH SPEED to take the hit. After it takes the hit, it backs away at TOUCH SPEED until it reaches the RETRACT DISTANCE. At this point, it proceeds to the next location at MOVE SPEED.